Blank for forming six-tined pitchforks.



No. 832,733. PATENTED OCT. 9, 1906.

0. K. JANSEN & P. & K. EISBRENNER.

BLANK FOR FORMING SIX TINED PITOHFORKS.

APPLICATION FILED JAN.20,1906.

WITNESSES.

OR/VEKS m: mum/s PITIRS cm, wqmnuron, n. c.

UNITED STATES PATENT OFFICE.

CARL K. JANSEN, FRANK EISBRENNER, AND KASH EISBRENNER, OF TILSONBIIRG,ONTARIO, CANADA; SAID FRANK EISBRENNER AND SAID KASH EISBRENNERASSIGNORS TO THE MAPLE LEAF HAR- VEST TOOL COMPANY, LIMITED, OFTILSONBURG, CANADA.

BLANK FOR FORMING SlX-TINED PITCHFORKS- Specification of Letters Patent.

Patented Oct. 9, 1906.

Application filed January 20, 1906. Serial No. 297,056.

To all whom it may concern:

Be it known that we, CARL K. JANsEN, FRANK EISBRENNER, and KASH ErsBREN-NER, of the town of Tilsonburg, in the Province of Ontario, Canada, haveinvented certain new and useful Improvements in Blanks for FormingSix-Tined Pitchforks, of which the following is a specification.

The object of our invention is to devise a blank for the manufacture ofsix tined manure forks, straw-forks, and the like which may be stampedfrom the stock with a minimum waste of material and in which portions ofthe blanks from which the tines and shank are rolled are properly spacedand separated'in the process of stamping, so that subsequent separationand s ac1ng arev avoided; and it consists, essentlally, in theconstruction hereinafter more specifically described and then definitelyclaimed.

Figure 1 is a plan View showing two complete blanks for a six-tined forkand parts oftwo others as turned out by the first stamping. Fig. 2 is aplan view of a single blank finished ready for the rolls.

In the drawings like letters of reference indicate corresponding partsin the different figures.

Referring particularly to Fig. 1, it will be seen that each blankcomprises a shank portion A, outer tine portions B and O, extending inthe same direction as the shank, inner tine portions D and E, extendingin the opposite direction to the shank, and intermediate tine portions Fand G, extending in the same direction as the tine portions D and E. Thedie used in stamping the blank is so shaped that as stamped out theshank portion A is separated from the outer tine portions B and C byspaces corresponding exactly in size and shape to the inner tineportionsD and E before they are subjected to the second operation,hereinafter described. The inner tine portions D and E are separatedfrom one another by a space corresponding exactly in size and shape tothe shank prior to the second operation already referred to. Theintermediate tine portions F and G are separated from the inner tineportions D and E by spaces corresponding exactly in size and shape tothe outer tine portions B and C. The tine portions of the shank areintegrally connected by the head of the fork H, and it will be notedthat the intermediate tine portions F and G are integral with the blanksubstantially at the juncture between the outer tine portions B and Cand the head of the fork. The blanks are thus turned out in the firstoperation without waste; but before they are in a con dition to pass tothe rolls a further operation is necessary. By means of an irregulartriangular punch a piece of stock is cut away of a roughly triangularshape, as shown at I in Fig. 2. This piece I represents the only wasteof material in forming the blank ex cept, of course, the necessary wasteat the ends of the stock. The head of the fork H, it will be seen, isnow left bent or curved, so as to throw the points of connection a and bof the intermediate tine portions inwardly and forwardly in thedirection of the shank.

Vhile we prefer to shape the spacing material or fork-head substantiallyas the segment of a circle, yet any other shape in which the spacingmaterial would be concave toward the shank would. in a large measureanswer the purpose of our invention. By thus shaping the head of thefork the waste I is reduced to a minimum, being substantially of theirregular triangular shape shown in dotted lines in Fig. 1 less thespace occupied by the point of the shank'A of the next blank, whichnearly touches the base of the head of the fork. The head of the fork isso curved and proportioned that when straightened out the center andintermediate tine portions are accurately spaced in the positions theyoccupy in the finished fork.

From the construction described it will be seen that we have devised ablank for forme ing six-tined forks in which the tine portions and shankportion are all properly separated in the operation of stamping, so thatno subsequent splitting or separating is necessary. This gives our blankimportant advantages over those heretofore employed, in which splittingsubsequent to stamping was generally necessary, involving additionaloperations and also the services of additional men.

What we claim as our invention is- 1. An integral blank for formingpitchforks and the like, comprising the shank portion; the outer tineportions extending in the same direction as the shank; the inner tineportions extending in the opposite direction; the head of the forkconnecting the parts, and cut convex toward the inner tine portions; andintermediate tine portions connected with the blank at the juncture ofthe head and the outer tine portions, and extending in the samedirection as the inner tine portions, substantially as described.

2. An integral blank for forming pitchforks and the like, comprising theshank portion; the outer tine portions, extending in the same directionas the shank, and separated therefrom by spaces corresponding in shapeand size to the inner tine portions; the

inner tine portions extending in the opposite direction, and separatedby a space corresponding in size and shape to the shank; the head of thefork connecting the parts, and intermediate tine portions connected withthe blank at the juncture of the head and the outer tine portions andseparated from the inner tine portions by spaces corresponding in sizeand shape to the outer tine portions, substantially as described.

3. An integral blank for forming pitchforks and the like, comprising theshank portion; the outer tine portions; extending in the same directionas the shank, and separated therefrom by spaces corresponding in shapeand size to the inner tine portions, the inner tine portions extendinginthe opposite direction, and separated by a space corresponding in sizeand shape to the shankthe head of the fork connecting the parts, and outconvex toward the inner tine portions, and intermediate tine portionsconnected with the blank at the juncture of the head and the outer tineportions, and separated from the inner tine portions by spacescorresponding in size and shape to the outer tine portions,substantially as described.

Tilsonburg, Ontario, January 13, 1906.

CARL K. JANSEN. FRANK EISBRENNER. KASH EISBRENNER.

In presence of W. A. DOWLER, C. H. DENTON.

